Mount Rainier National Park —The online National Park Services resource dedicated to learning about and visiting Mount Rainier. This website contains information on history, nature, outdoor activities, and park conditions.
Pacific Northwest Seismic Network's Mount Rainier Website—The premier source for information about seismic activity at Mount Rainier.
Mount Rainier Active Volcano, Pierce County Emergency Planning—This website provides information relating to the volcanic hazards associated with Mount Rainier. It contains an emergency response plan, evacuation routes, the Hazard Identification and Vulnerability Assessment, and general Mount Rainier volcano information.
Washington Department of Natural Resources geology web portal—An online service offered by the Washington Division of Geology and Earth Resources that provides access to interactive earth science mapping, data, and related information.
Discover Your Northwest—A good source of books, maps, and other information relating to Mount Rainier and the surrounding area.
Washington Trails Association—Information about hiking trails around Mount Rainier. The Washington Trails Association's mission is to preserve, enhance, and promote hiking opportunities in Washington state through collaboration, education, advocacy and volunteer trail maintenance.
Summit Post Climbing Information for Mount Rainier—An resource for technical mountaineering information supported by a community of outdoor enthusiasts who share information and stories about backpacking, rock climbing, hiking, and camping.